ואלה המשפטים אשר תשים לפניהם And these are the laws you should place before them
Rashi’s comment on this pasuk is that had the word אלא been used, this would have been explained to have excluded the earlier commands of Hashem. Since the Torah uses the word ואלא, the meaning is to add these to the earlier commandments. Just as the earlier commandments came from Sinai, so too, these came from Sinai.
The Sefer Zera Avraham (Rav Reuven Dowek) delves deeper into this commentary. Since we already know that the entire Torah was given at Sinai, what was Rashi’s explaining? The Zera Avraham elucidates that there are certain mItzvos that we think we can understand the reason for which they were commanded. There are other mitzvos, though, that we perceive are laws from Hashem for which we may never understand the reason. We keep these mitzvos because Hashem commanded us to do so. Really, though, we don’t truly know the explanation for any of the mitzvos, even those that appear to make sense to us. Therefore, we need to observe both types of mitzvos solely because Hashem commanded us. Sefer Zera Avraham explains that the Torah was created before the world was created and before there were people in the world. The mitzva for one not to kill was determined before there was anyone around to kill. He explains that we shouldn’t think the mitzvos were given to establish a functional society because these mitzvos predated society.
One could imagine that all of the rules in this week’s parsha, which are focused on the relationship between man and man, are mitzvos because that is what our intellect tells us. Based on Sefer Zera Avraham’s explanation, Rashi is clarifying to us that this is not the reason to observe these mitzvos. We observe these mitzvos only because Hashem commanded us. We need to observe these mitzvos that we think would be sensible in the same way that we keep all of the other mitzvos given to us at Sinai for which the reason doesn’t seem to be obvious.
Extrapolating from this concept, Sefer Zera Avraham explains why one cannot bring a case to a gentile court, even if the law seems similar to Jewish law. He explains that while the law may be the same, the reason behind it is different. Non-Jews establish laws to enable people to live safely in a society. We, however, observe laws because Hashem commanded us.
We should always keep in mind that everything we do is because Hashem commanded it. By doing this, we will maintain a constant connection and feeling towards Hashem and we will always feel His presence as Master of the Universe.